1. Meselson, M. & Radding, C. M. Proc. natn. Acad. Sci. U.S.A. 72, 356–361 (1975).
2. Radding, C. M. et al. Cold Spring Harb. Symp. quant. Biol. 47, 821–828 (1982).
3. Szostak, J. W., Orr-Weaver, T. L., Rothstein, R. J. & Stahl, F. W. Cell 33, 25–35 (1983).
4. Fogel, S., Mortimer, R. K. & Lusnak, K. in The Molecular Biology of the Yeast Saccharomyces (eds Strathern, J., Jones, E. & Broach, J.) 289–339 (Cold Spring Harbor, New York, 1981).
5. Whitehouse, H. L. K. Genetic Recombination: Understanding the Mechanisms (Wiley, New York, 1982).